tizen/src/hw/brightness.c

   1 /*
   2  * Qemu brightness emulator
   3  *
   4  * Copyright (C) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
   5  *
   6  * Contact:
   7  * DoHyung Hong <don.hong@samsung.com>
   8  * SeokYeon Hwang <syeon.hwang@samsung.com>
   9  * Hyunjun Son <hj79.son@samsung.com>
  10  * SangJin Kim <sangjin3.kim@samsung.com>
  11  * MunKyu Im <munkyu.im@samsung.com>
  12  * KiTae Kim <kt920.kim@samsung.com>
  13  * JinHyung Jo <jinhyung.jo@samsung.com>
  14  * SungMin Ha <sungmin82.ha@samsung.com>
  15  * JiHye Kim <jihye1128.kim@samsung.com>
  16  * GiWoong Kim <giwoong.kim@samsung.com>
  17  * YeongKyoon Lee <yeongkyoon.lee@samsung.com>
  18  * DongKyun Yun <dk77.yun@samsung.com>
  19  *
  20  * This program is free software; you can redistribute it and/or
  21  * modify it under the terms of the GNU General Public License
  22  * as published by the Free Software Foundation; either version 2
  23  * of the License, or (at your option) any later version.
  24  *
  25  * This program is distributed in the hope that it will be useful,
  26  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  27  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  28  * GNU General Public License for more details.
  29  *
  30  * You should have received a copy of the GNU General Public License
  31  * along with this program; if not, write to the Free Software
  32  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  33  *
  34  * Contributors:
  35  * - S-Core Co., Ltd
  36  *
  37  */
  38
  39
  40 #include "pc.h"
  41 #include "pci.h"
  42 #include "pci_ids.h"
  43
  44 #define QEMU_DEV_NAME                       "brightness"
  45
  46 #define BRIGHTNESS_MEM_SIZE         (4 * 1024)      /* 4KB */
  47 #define BRIGHTNESS_REG_SIZE         256
  48
  49 #define BRIGHTNESS_MIN              (0)
  50 #define BRIGHTNESS_MAX              (24)
  51
  52 typedef struct BrightnessState {
  53     PCIDevice dev;
  54
  55     ram_addr_t  offset;
  56     int brightness_mmio_io_addr;
  57
  58     uint32_t ioport_addr;   // guest addr
  59     uint32_t mmio_addr;     // guest addr
  60 } BrightnessState;
  61
  62 enum {
  63     BRIGHTNESS_LEVEL    = 0x00,
  64     BRIGHTNESS_OFF    = 0x04,
  65 };
  66
  67 //uint8_t* brightness_ptr;  // pointer in qemu space
  68 uint32_t brightness_level = 24;
  69 uint32_t brightness_off = 0;
  70
  71 //#define DEBUG_BRIGHTNESS
  72
  73 #if defined (DEBUG_BRIGHTNESS)
  74 #  define DEBUG_PRINT(x) do { printf x ; } while (0)
  75 #else
  76 #  define DEBUG_PRINT(x)
  77 #endif
  78
  79 static uint32_t brightness_reg_read(void *opaque, target_phys_addr_t addr)
  80 {
  81     switch (addr & 0xFF) {
  82     case BRIGHTNESS_LEVEL:
  83         DEBUG_PRINT(("brightness_reg_read: brightness_level = %d\n", brightness_level));
  84         return brightness_level;
  85
  86     default:
  87         fprintf(stderr, "wrong brightness register read - addr : %d\n", addr);
  88     }
  89
  90     return 0;
  91 }
  92
  93 static void brightness_reg_write(void *opaque, target_phys_addr_t addr, uint32_t val)
  94 {
  95     DEBUG_PRINT(("brightness_reg_write: addr = %d, val = %d\n", addr, val));
  96
  97 #if BRIGHTNESS_MIN > 0
  98     if (val < BRIGHTNESS_MIN || val > BRIGHTNESS_MAX) {
  99 #else
 100     if (val > BRIGHTNESS_MAX) {
 101 #endif
 102         fprintf(stderr, "brightness_reg_write: Invalide brightness level.\n");
 103     }
 104
 105     switch (addr & 0xFF) {
 106     case BRIGHTNESS_LEVEL:
 107         brightness_level = val;
 108         return;
 109     case BRIGHTNESS_OFF:
 110         DEBUG_PRINT(("Brightness off : %d\n", val));
 111         brightness_off = val;
 112         return;
 113     default:
 114         fprintf(stderr, "wrong brightness register write - addr : %d\n", addr);
 115     }
 116 }
 117
 118 static CPUReadMemoryFunc * const brightness_reg_readfn[3] = {
 119     brightness_reg_read,
 120     brightness_reg_read,
 121     brightness_reg_read,
 122 };
 123
 124 static CPUWriteMemoryFunc * const brightness_reg_writefn[3] = {
 125     brightness_reg_write,
 126     brightness_reg_write,
 127     brightness_reg_write,
 128 };
 129
 130 #if 0
 131 static void brightness_ioport_map(PCIDevice *dev, int region_num,
 132                    pcibus_t addr, pcibus_t size, int type)
 133 {
 134     //BrightnessState *s = DO_UPCAST(BrightnessState, dev, dev);
 135
 136     //cpu_register_physical_memory(addr, BRIGHTNESS_MEM_SIZE,
 137     //           s->offset);
 138
 139     //s->ioport_addr = addr;
 140 }
 141 #endif
 142
 143 static void brightness_mmio_map(PCIDevice *dev, int region_num,
 144                    pcibus_t addr, pcibus_t size, int type)
 145 {
 146     BrightnessState *s = DO_UPCAST(BrightnessState, dev, dev);
 147
 148     cpu_register_physical_memory(addr, BRIGHTNESS_REG_SIZE,
 149                                  s->brightness_mmio_io_addr);
 150
 151     s->mmio_addr = addr;
 152 }
 153
 154 static int brightness_initfn(PCIDevice *dev)
 155 {
 156     BrightnessState *s = DO_UPCAST(BrightnessState, dev, dev);
 157     uint8_t *pci_conf = s->dev.config;
 158
 159     pci_config_set_vendor_id(pci_conf, PCI_VENDOR_ID_TIZEN);
 160     pci_config_set_device_id(pci_conf, PCI_DEVICE_ID_VIRTUAL_BRIGHTNESS);
 161     pci_config_set_class(pci_conf, PCI_CLASS_DISPLAY_OTHER);
 162
 163     //s->offset = qemu_ram_alloc(NULL, "brightness", BRIGHTNESS_MEM_SIZE);
 164     //brightness_ptr = qemu_get_ram_ptr(s->offset);
 165
 166     s->brightness_mmio_io_addr = cpu_register_io_memory(brightness_reg_readfn,
 167                                              brightness_reg_writefn, s,
 168                                              DEVICE_LITTLE_ENDIAN);
 169
 170     /* setup memory space */
 171     /* memory #0 device memory (overlay surface) */
 172     /* memory #1 memory-mapped I/O */
 173     //pci_register_bar(&s->dev, 0, BRIGHTNESS_MEM_SIZE,
 174     //      PCI_BASE_ADDRESS_SPACE_IO, brightness_ioport_map);
 175
 176     pci_register_bar(&s->dev, 1, BRIGHTNESS_REG_SIZE,
 177                      PCI_BASE_ADDRESS_SPACE_MEMORY, brightness_mmio_map);
 178
 179     return 0;
 180 }
 181
 182 /* external interface */
 183 int pci_get_brightness(void)
 184 {
 185     return brightness_level;
 186 }
 187
 188 int pci_brightness_init(PCIBus *bus)
 189 {
 190     pci_create_simple(bus, -1, QEMU_DEV_NAME);
 191     return 0;
 192 }
 193
 194 static PCIDeviceInfo brightness_info = {
 195     .qdev.name    = QEMU_DEV_NAME,
 196     .qdev.size    = sizeof(BrightnessState),
 197     .no_hotplug   = 1,
 198     .init         = brightness_initfn,
 199 };
 200
 201 static void brightness_register(void)
 202 {
 203     pci_qdev_register(&brightness_info);
 204 }
 205
 206 device_init(brightness_register);